Other resources about the language

ONLINEThe evolution of grammar: Tense, aspect and modality in the languages of the world. Bybee, Joan L.; Perkins, Revere; Pagliuca, William. 1994. The University of Chicago Press.
oai:refdb.wals.info:4270

The use of word drills in primers. Clevenger, Joycelyn. 1972. Notes on Literacy.
oai:sil.org:5304

Some abstract features of Kwa vowel harmony: An autosegmental approach to Engenni, Igbo, Akan, and Yoruba. Savage, T. Dale. 1987. Linguistic Association of Canada and the United States.
oai:sil.org:35020